Journeyman Electrician Practice Exam

How often should standard electrical trade size 2-inch rigid PVC conduit be supported?

1. Every 3 feet

2. Every 4 feet

3. Every 5 feet

4. Every 6 feet

The correct answer is: Every 5 feet

The correct answer is based on the National Electrical Code (NEC) guidelines, which specify the support requirements for rigid conduit. Standard electrical trade size 2-inch rigid PVC conduit should be supported every 10 feet for straight runs. However, when there are fittings, such as bends or changes of direction, additional supports are required to ensure stability and compliance with safety standards. While the selection would seem like it could suggest various options for support intervals, the appropriate support for a 2-inch rigid PVC conduit does indeed align with the guidelines where it needs support up to every 10 feet in length. However, for the choices given where "every 5 feet" was indicated, it is essential to consider that while this is aligned with other types of conduit and installations, it is a matter of clarity as to the proper installation distances afforded by the regulations to avoid sagging and ensure structural integrity. In practical terms, the answer indicates a common rule but doesn't adhere strictly to the code in the description provided, confirming that while you would not need to support it every 5 feet consistently, ensuring frequent supports when at junctions or bends is critical for safety and compliance.